The head gasket can fail causing the coolant and oil to mix in the engine, and external leaks. Symptoms can include overheating, white smoke from the tailpipe at start-up or acceleration, and the visible presence of oil in the coolant expansion tank.

Problem happens within 10-20minutes of driving.Becomes a high pitch on freeway then a slower shuddering sound on city block streets.
When I step on brake sound goes away instantly and completely for a few minutes then reappears.At first sounds like passenger side by wheels then sounds more like ...

It's an 86' C900S and I'm looking to buy one but the ac does not work and person never attempted to fix...he said there was that the hoses were loose on the refridgeraunt and just assumed it didn't work. How should I approach this?

I had the 900 turbo for 6 years from 1999 to 2005 and it was a complete disaster. It worked maybe half the time I owned it. I had to replace the head gasket, the exhaust manifold gasket multiple times, 2 turbos...it's a very long and expensive list. Eventually the rings on the motor blew and I got a new motor from a salvage yard.
Also, there is a vent in the hood which somehow allowed rain wat...

The selection does not include my year a 1986 900 model. Well built with few bells and whistles. Only a buzzer when key remains in ignition switch. Normal wear items replaced. Extremely solid construction. Door panels have screws that allow E-Z access of window regulator that will never fail because it is manual with hand crank. Glass sealed head lights that don't fade after years of driving. N...